NC0027197_Correspondence_19900418

NPDES DOCUHENT SCANNINO COVER SHEET
Permit:
NC0027197
Shelby WTP
NPDES
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
April 18, 1990
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State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Water Resources
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
April 18, 1990
Mr. John W. McLaughlin, P.E.
J.N. Pease Associates
P.O. Box 18725
Charlotte, NC 28218
John N. Morris
Director
Subject: City of Shelby, Cleveland County, Expansion of
Water Treatment Plant on the First Broad River
Dear Mr. McLaughlin:
This is in reference to your March 28, 1990 letter
to Mr. Trevor Clements and the April 3, 1990 reply by Marcia
L. Toler-McCullen, both of the Division of Environmental
Management of this Department. In our April, 1989 Cleveland
County Water Supply Survey report, page 7-13, copy of which
page is enclosed, we estimate that the 7Q10 for the 225
square mile watershed above the Shelby intake is 38.5
MGD/59.6 cfs or 0.26 cfsm. This latter figure matches the
Summer 7Q10 specific discharge for the stations above and
below Shelby as shown on DEM's USGS master flow file page
listing.
You should be advised however, that the 7Q10 flow
may not provide sufficient water to maintain instream uses
downstream from a water withdrawal intake. Quantifying this
instream flow need requires an evaluation of many factors,
including; magnitude of withdrawal, amount of off stream
storage, location and magnitude of wastewater return, value
of aquatic habitat, channel geometry, and presence of other
instream uses. In some cases a site -specific instream flow
study may be required to quantify the withdrawal limitations
ECflVED
MAY 0 4 1990
T ECHN±CAt SUPPORT BRANCH
P.O. Box 27687, Raleigh, North Carolina 27611.7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

McLaughlin letter
April 18, 1990
Page 2
Also enclosed is an enlarged copy of a portion of
the Shelby, NC USGS 7 1/2 minute quadrangle map showing to
the best of our knowledge the locations of the following:
Facility
Latitude Longitude
Low head dam or weir 35' 18' 19" 81' 33' 50" *
Intake # 1 (upstream) 35' 18' 22" 81' 33' 36" #
Intake 4 2 (downstream) 35' 18' 19" 81' 33' 55" #
Source of position data:
* field notes on quad map
# Water Supply Intake Locations - DEM
I trust this information in addition to that
provided by DEM provides closure to your request. If you have
any questions about this material or if we can be of further
assistance, please contact us.
cc:
Sidney L. Harrell
Environmental Engineer
Water Supply Assistance Section
John Wray
John Sutherland
Steve Reed
J. Trevor Clements
Steve Zoufaly
Wally Venrick
Joel Storrow, McGill Assoc.

CITY OF SHELBY
Pi'e: Ser:t Source
The City of Sherny withdraws raw water s.:r ply an intake on the First
Broad River. The city's water supply intake is located approximately one mile
upstream of the US 74 bridge crossing. The drainage area at the intake is
approximately 225 square miles and average flow is about 204 MGD. The 7Q10
minimum flow is estimated to be 38.5 MGD. Three small off stream raw water
storage reservoirs with a total capacity of about 19 million gallons provide the
flexibility of operating for two days without withdrawing water from the river.
United States Geological Survey streamflow data indicates an unadjusted draft
rate of about 30 MGD for water supply from the First Broad River at Shelby's
intake.
The City of Shelby operates a Class A water treatment plant, which was
originally built in 1949 and upgraded in 1.960. :n 1974, high rate filters were
installed to increase plant capacity. The treatment facility has a finished
water and pumping capacity of 10.5 MGD.
Present. Use
In 1987, t.ho city reported that it served an estimated population of
a.,: :!'e7xitiiaLC ;' 20,000 thciu•_.._nq 8,647 ,?":titer ed c'.:s :..ers, 1,935 of which were
located 3.?; suburban areas. The plint treated _ .'erage of .93 NGD, reaching a
maximum d::iiy peak of 9. 6C ?•;GD _t: Approxi a _ely 45 percent of the ;cater
p:'ocu .:e0 was sic' larg _industrial and com ;e-_ _i_ customers as listed in
1abie
-'ro _ ter :deeds
;? ;� ' _r. [- - n,•.'from - • -- Broad River f r, :•.
._,:.. �:. ai � i= _ Y:�:-. � i� s�_r ..�."•: the - -- � _ �:e'oa . o�'
appea s tO exceed pr. ec C ed 2020 water need.
Water .. s e
Year
Population Served
Average wily
(MG:
1990
MOO
7 .
2000
22575
7._=
2010
2.4300
, . ; ;.
2020
26150
:_._E
Alternative Considerations
3. Modify operational practices.
n`.'e :Y kqa l e to de l.erifl.::.c' the ad-'ust ed draft: a7.7: feasibility for
:j:�i t:•_. _tip; I,: - - ::�::-!'1.�%E: l:_.'.c'1' supply f= the r''1rst. Broad River.
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WS INTAKE 4 23-03
SURFACE WATER SUPPLY INTAKES
EXTRACTION SOURCE: FIRST BROAD RIVER (#1)
MAJOR WATERWAY: FIRST BROAD RIVER
CLASSIFICATION: WS—III
LOCATION:
COUNTY:
COMMUNITY:
RIVER BASIN:
SUBBASIN NO.:
DISCHARGERS:
FACILITY NAME
MONITORING:
STATION NO.
CLEVELAND
SHELBY
BROAD
030804
NOTES:
DISCHARGERS PENDING
NPDES NO.
TYPE
LATITUDE: 351822
LONGITUDE: 813336
TOPO MAP NO.: F12SE5
DRAINAGE AREA:
TYPE
DISTANCE(MILES)
DISTANCE(ABOVE CR BELOW)
`.4s --

WS INTAKE 4 23-04
SURFACE WATER S"„PPLY INTAKES
EXTRACTION SOURCE: FIRST BROAD RIVER (0 2 )
MAJOR WATERWAY: FIRST BROAD RI':'ER
CLASSIFICATION: WS-III
LOCATION:
COUNTY:
COMMUNITY:
RIVER BASIN:
SUBBASIN NO.:
DISCHARGERS:
FACILITY NAME
MONITORING:
STATION NO.
CLEVELAND
SHELBY
BROAD
030804
NOTES:
DISCHARGERS PENDING
NPDES NO.
TYPE
LATITUDE: 351819
LONGITUDE: 813355
TOPO MAP NO.: F12SE5
DRAINAGE AREA:
TYPE
DISTANCE(MILES)
DISTANCE(ABOVE OR BELOW)

•
SHELBY, _ NORTH CAROLINA
##23-010
'Survey Date: May 18, 1977
General
The City of Shelby was reported in the 1970 Census to have a population
of 16,328 people. In 1975, the North Carolina Department of Administra-
tion estimated that the population of Shelby was about 16,500 people.
City personnel estimate that over 23,000 people are currently served by
the water system in a service area which includes all of the corporate
city limits and surrounding fringe areas. The Shelby water system has
a total of 7,810 user connections, all of which are metered, and serves
numerous industrial and institutional complexes as well as the residential
sector.
Water consumption within the Shelby service area averages about 4.2 million
gallons per day (mgd). The maximum daily consumption on record is 6.6 mgd.
The water distribution system, most of which was constructed in the late
1940's, consists primarily of cast iron and ductile iron pipe. However,
some galvanized steel and asbestos cement pipe have been used in the
system. Finished water storage is comprised of 8.0 million gallons (mg)
of ground level storage at the water treatment plant and a total of 1.0 mg
of elevated storage throughout the system. Fire flow protecticn i;
provided to all sections of the service area, and the City employs person-
nel who maintain the distribution system on a continuing basis. The City
also has an active cross -connection control program. Samples collected
from the distribution system on a daily basis are analyzed for chlorine.
residual and certain chemical characteristics. Samples taken twice weekly
are analyzed for bacteriological contamination at the City's treatment plant
laboratory. In addition, a monthly bacteriological sample is sent to the
North Carolina Division of Health Services Laboratory in Raleigh, North
Carolina. •
Water Supply
At the present time, Shelby's sole source of raw water supply is the First
Broad River, which is located in the Broad River Basin. Water is withdrawn
at two intakes located about 1,00E feet apart at a low dam and diversion
structure on the northwest side of the City. The City has raw water pumps
which theoretically could provide in excess of 20 mgd. However, it is
estimated by City personnel that about 9.0 mad is the realistic pumping
capacity due tou
P .r pipeline limitations. The USGS estimates that the allow-
able draft of the First Broad River at the point of intake is about 30 mgd.
This is well in excess of the average demands currently being placed on
the system. There appear to be no significant problems associated with
the First Broad .River as a source of raw water supply.
23-010 1